Progressive scan vs. line doublers

Discussion in 'Archived Threads 2001-2004' started by Ashford Little, Oct 23, 2001.

  1. Ashford Little

    Ashford Little Stunt Coordinator

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    The newest must have item in DVD players is progressive scan. I understand what it does.
    However, HD-capable tv's frequently refer to line doubling. Is this any different than progressive scan?
    If not, then is there a difference if you run a non-progressive scan DVD player through a HD-capable tv that doubles the lines?
    Thx
    RAL
     
  2. Selden Ball

    Selden Ball Second Unit

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    Selden
    A progressive scan DVD player puts out all 480 scanlines in 1/60 of a second: the player merges the separate fields digitally before generating the analog video signal.
    A TV (or video scaler) that does linedoubling merges the two separate intelaced fields of 240 scanlines itself.
    Which is better depends on the relative quality of the circuitry in the player and the TV. There are lots of ways either can botch it. You'll have to carefully read the reviews of the players and TVs you're interested in to see which is better.
    Also, some older TVs can't accept a 480p progressive input signal even though they include an internal linedoubler.
     

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